.btn-container {
  height: 300px;
  text-align: center;
  line-height: 300px;
}
button {
  width: 80px;
  height: 40px;
  color: #ffffff;
  background: #3f00ffc7;
  border-radius: 10px;
  box-shadow: 5px 5px grey;
  font-size: 20px;
  border: none;
  cursor: pointer;
}
.dialog {
  background: #000000a1;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: none;
}
.content {
  animation: zx 1s;
  transition: all 1s;
  text-align: center;
  position: absolute;
  background: azure;
  left: 0;
  right: 0;
  bottom: 0;
  top: 36%;
  padding-top: 30px;
}
@keyframes zx {
  0% {
    top: 100%;
    opacity: 0;
  }
  100% {
    top: 36%;
    opacity: 1;
  }
}
